水稻株型特征与产量构成关系的研究

Study on relationships between properties of plant type and yield components in rice

选用4个不同株型水稻品种,研究了株型指标、产量构成以及两者之间的关系。结果表明不同株型品种叶片角度与枝梗数存在一定的相关性,其中:沈农606剑叶基角和剑叶开张角与一次枝梗数呈负相关;辽粳294倒二叶基角与二次枝梗数呈负相关;秋光穗基角与二次枝梗数呈负相关;辽盐16倒二叶基角与一次枝梗数、千粒重呈负相关。在株高相差不大的情况下,茎秆粗壮是沈农606抗倒伏的主要原因。紧凑型品种各叶位叶绿素含量较高,而且不同叶位叶绿素含量差异较小。紧凑型品种的株型有利于产量的形成;对披散型品种进行株型改良有利于其形成更好的群体。

Using 4 rice varieties with different plant types,properties of plant type and yield components and the relationships of them were studied. The result indicated that there was negative relationship between the angle of flag leaf and primary branches of Shennong 606; Correlationship between secondary leaf basic angle and secondary branches was negative of Liao jing 294. For Akihikari,there was negative relationship between panicle basic angle and secondary branches.Correlationship between secondary leaf basic angle and primary branches and 100-grain weight were negative of Liaoyan16. The major reason of resistant to loading of Shennong 606. is the stronger stem under the condition that the difference of all varieties plant height were not obvious. Plant type characters of the compact plant type varieties were propitious to their yield and improving plant type for the diffuse varieties would benefit them forming better population.